The Lansky 3 Stone Standard System is a complete knife sharpening kit intended to offer knife enthusiast everything they need to keep and maintain a sharp edge on all of their knives. The Ultimate in Knife Sharpening Systems Technology Safe, Easy and Convenient to Use. The Lansky Controlled Angle Sharpening System is designed to give your blade a professional, razor sharp edge every time. The Lansky Controlled-Angle Sharpening System is designed to give your blade a professional, razor sharp edge every time.